Weekly Information about Bright Comets (2019 Jan. 5: North)

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Updated on January 5, 2019
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* 46P/Wirtanen

It approached to Earth down to 0.08 a.u. in mid December, and it brightened up to 3.4 mag (Dec. 14, Seiichi Yoshida). it looked so large as 3 times of Moon. Now it is fading. But it is very bright as 5.5 mag still now (Jan. 3, Carlos Labordena). In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it is not observable until February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   7 44.65   59  4.1   0.143   1.100   142    4.5   0:47 (180, 66)  
Jan. 12   8 34.20   59 23.6   0.182   1.130   140    5.2   1:10 (180, 66)  

* 64P/Swift-Gehrels

Now it is very bright as 9.1 mag (Jan. 1, Juan Jose Gonzalez). It is observable in excellent condition in the Northern Hemisphere. It stays low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   3  7.13   29 23.5   0.771   1.577   127    9.7  20:10 (  0, 84)  
Jan. 12   3 23.84   28 35.2   0.844   1.616   124   10.2  19:59 (  0, 84)  

* 38P/Stephan-Oterma

Now it is bright as 9.9 mag (Jan. 1, Juan Jose Gonzalez). It stays 9-10 mag until January. In the Northern Hemisphere, it stays observable in good condition for a long time until it fades out. It locates low in the Southern Hemispehre.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   8 35.48   42  6.4   0.800   1.732   152   10.0   1:40 (180, 83)  
Jan. 12   8 34.66   44  6.2   0.830   1.768   154   10.3   1:12 (180, 81)  

* C/2018 Y1 ( Iwamoto )

Bright new comet. Now it is very bright as 10.4 mag (Jan. 3, Katsumi Yoshimoto). It will approach to Earth down to 0.3 a.u. in February. Then it will brighten up to 7 mag and will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  14 13.08  -23 38.0   1.449   1.372    65   10.7   5:38 (335, 27)  
Jan. 12  14  7.12  -22 43.2   1.217   1.338    74   10.2   5:38 (343, 30)  

* C/2018 L2 ( ATLAS )

Now it is 11.8 mag (Dec. 5, Sandor Szabo). It stays at 11 mag until February. In the Northern Hemisphere, it stays observable for a long time until it fades out. But it stays extremely low. It will never be observable again in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  19  7.35   20  9.0   2.356   1.767    42   11.0  18:32 (110,  7)  
Jan. 12  19 29.40   22 36.4   2.357   1.791    44   11.2   5:38 (248,  8)  

* C/2016 M1 ( PanSTARRS )

It brightened up to 7.7 mag in June (June 19, Juan Jose Gonzalez). Now it is fading. But it is still bright as 10.6 mag (Dec. 26, Chris Wyatt). In the Southern Hemisphere, it stays observable in good condition for a long time until the comet will fade out. In the Northern Hemisphere, it is not observable for a long time until autumn in 2019 when the comet fades out down to 16 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  22 37.88  -85 54.1   3.041   2.772    64   11.6  18:32 (  3,-32)  
Jan. 12   0 41.62  -83 57.6   3.053   2.819    67   11.7  18:37 (  2,-29)  

* C/2016 N6 ( PanSTARRS )

Now it is 11.9 mag (Dec. 31, Seiichi Yoshida). It stays 12 mag for a long time until spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   7 11.71  -19 12.0   2.402   3.201   138   12.5   0:17 (  0, 36)  
Jan. 12   6 55.74  -20 28.1   2.452   3.240   136   12.6  23:28 (  0, 34)  

* 78P/Gehrels 2

Now it is 13.3 mag (Dec. 5, Sandor Szabo). It stays at 12-13 mag for a long time until autumn in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  22 59.99   -4  8.7   2.442   2.137    60   12.8  18:32 ( 50, 38)  
Jan. 12  23 12.92   -3  6.0   2.491   2.119    56   12.8  18:37 ( 55, 35)  

* C/2016 R2 ( PanSTARRS )

Now it is 13.1 mag (Dec. 4, Thomas Lehmann). It will be fading slowly after this. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until summer in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  15 29.01   40 42.7   3.626   3.593    80   13.0   5:38 (247, 55)  
Jan. 12  15 37.09   40 58.9   3.626   3.640    83   13.0   5:38 (247, 59)  

* C/2018 N2 ( ASASSN )

Now it is 13.9 mag (Dec. 28, Chris Wyatt). It will brighten up to 10-11 mag in autumn in 2019. It stays observable in good condition for a while in the Southern Hemisphere. In the Northern Hemisphere, it stays extremely low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   1  3.09  -33  3.7   4.370   4.279    78   13.5  18:32 (  6, 22)  
Jan. 12   1  2.35  -31 10.5   4.420   4.237    72   13.5  18:37 ( 14, 23)  

* 29P/Schwassmann-Wachmann 1

Now it is bright as 12.9 mag (Dec. 5, Sandor Szabo).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  23  1.16    0 13.5   6.153   5.768    62   13.7  18:32 ( 53, 41)  
Jan. 12  23  5.04    0 35.5   6.250   5.767    56   13.7  18:37 ( 60, 36)  

* 60P/Tsuchinshan 2

Now it is 13.8 mag (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). It is observable at 14 mag in excellent condition until March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 25.32   -1 15.5   1.002   1.641   111   13.9   4:29 (  0, 54)  
Jan. 12  11 33.33   -2 38.7   0.963   1.653   116   13.8   4:10 (  0, 52)  

* C/2017 M4 ( ATLAS )

Now it is 14.0 mag (Nov. 14, Kunihiro Shima). It stays 13-14 mag until summer in 2019. In the Northern Hemisphere, it is appearing in the morning sky. It will appear in late January also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  17 12.30  -11  6.1   4.085   3.254    28   14.2   5:38 (291, 10)  
Jan. 12  17 16.42  -12 17.6   4.025   3.252    33   14.1   5:38 (296, 14)  

* 123P/West-Hartley

Now it is 14.8 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13-14 mag in winter, and it will be observable in excellent condition. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 29.20   28  5.2   1.473   2.141   119   14.3   4:33 (  0, 83)  
Jan. 12  11 34.53   28 33.5   1.411   2.135   125   14.2   4:11 (  0, 83)  

* C/2015 O1 ( PanSTARRS )

Now it is 14.4 mag (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly after this. It is observable in excellent condition until spring in the Northern Hemispehre. In the Southern Hemisphere, it will be hardly observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 30.94   40  9.1   4.071   4.658   121   14.4   4:35 (180, 85)  
Jan. 12  11 21.66   41  6.2   4.020   4.693   128   14.4   3:59 (180, 84)  

* (944) Hidalgo

Now it is 14.3 mag (Nov. 30, Seiichi Yoshida). It stays at 14 mag until winter. It is observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until summer in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  13 30.40   79 13.2   1.504   2.070   110   14.5   5:38 (184, 46)  
Jan. 12  13 28.45   79 56.4   1.522   2.094   111   14.5   5:38 (182, 45)  

* 21P/Giacobini-Zinner

It brightened up to 6.8 mag in September (Sept. 17, Seiichi Yoshida). Now it is fading rapidly. It has already faded down to 13.8 mag (Dec. 21, Thomas Lehmann). It is observable in excellent condition in the Southern Hemisphere. It locates low after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   6 19.68  -36 15.6   1.120   1.825   120   14.8  23:20 (  0, 19)  
Jan. 12   6 13.18  -34 15.8   1.185   1.890   120   15.2  22:46 (  0, 21)  

* C/2017 B3 ( LINEAR )

Now it is 14.5 mag (Aug. 16, P. Camilleri, H. Williams). It stays 15 mag from 2018 to 2019, and it will be observable for a long time in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  20  1.18  -64 52.6   4.586   3.929    43   15.0  18:32 ( 29,-28)  
Jan. 12  20 23.13  -63 50.8   4.588   3.926    42   14.9  18:37 ( 30,-29)  

* C/2018 A6 ( Gibbs )

Now it is bright as 15.1 mag (Nov. 21, Artyom Novichonok). It stays 14 mag for a long time in 2019. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it is observable in low sky until early January, but it will be unobservable after that.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 25.58  -42 37.1   3.290   3.446    90   15.1   4:30 (  0, 12)  
Jan. 12  11 20.85  -45 17.5   3.186   3.418    95   15.0   3:57 (  0, 10)  

* 240P/NEAT

It brightened very rapidly up to 13.8 mag in August in 2017 (Aug. 22, Kunihiro Shima). Although it was faint as 16-17 mag in November, it brightened up to 14.7 mag in December (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in excellent condition after this. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 25.46   35  1.0   2.106   2.754   121   15.2   4:29 (  0, 90)  
Jan. 12  11 26.42   36 15.8   2.074   2.784   127   15.4   4:03 (180, 89)  

* C/2018 A3 ( ATLAS )

Now it is 15.2 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It stays 15 mag until March. It is observable in excellent condition in the Northern Hemisphere. It is not observable at all in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   9 51.94   72 18.2   2.613   3.278   125   15.2   2:58 (180, 53)  
Jan. 12   8 57.16   75  7.5   2.607   3.277   125   15.2   1:38 (180, 50)  

* C/2018 V1 ( Machholz-Fujikawa-Iwamoto )

New bright comet discovered by three amateur comet hunters. It brightened rapidly from 10 mag up to 8 mag just after the discovery. But after that, the brightness evolution became slow, and it faded down to 9.5 mag in December (Dec. 9, Alan Hale). In the Northern Hemisphere, it will never be observable again after this. In the Southern Hemisphere, it will appear in the morning sky in February. But it may be fainter than 18 mag at that time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  19 41.97  -23 13.1   1.848   0.893     9   15.4  18:32 ( 69,-11)  
Jan. 12  19 49.65  -25  1.0   2.002   1.027     5   16.3  18:37 ( 71,-16)  

* C/2017 T2 ( PanSTARRS )

Now it is 15.0 mag (Dec. 5, Sandor Szabo). It is expected to brighten up to 7-8 mag in 2020. In 2018, it will be observable at 15-16 mag in good condition from autum to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   3  5.05   -3 55.5   5.116   5.625   116   15.5  20:06 (  0, 51)  
Jan. 12   3  2.56   -3 20.0   5.156   5.564   109   15.5  19:36 (  0, 52)  

* 243P/NEAT

Although it was faint as 18 mag until Dec. 10, it suddenly brightened in outburst up to 15.4 mag on Dec. 12 (Dec. 12, A. Heinze). It stays observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   1 51.19    5 23.6   2.186   2.600   103   16.1  18:53 (  0, 61)  
Jan. 12   1 56.39    6 21.3   2.289   2.614    98   16.3  18:37 (  3, 61)  

* C/2018 N1 ( NEOWISE )

It approached to Earth down to 0.3 a.u., and brightened up to 8.3 mag in July (July 22, Juan Jose Gonzalez). Now it is fading. It has faded down to 13.2 mag in September (Sept. 24, Thomas Lehmann). In the Northern Hemisphere, it already locates high. It is appearing in the morning sky also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  15 28.32   -0 54.2   2.941   2.527    56   16.4   5:38 (302, 36)  
Jan. 12  15 27.01    0  9.2   2.888   2.602    63   16.5   5:38 (308, 41)  

* 171P/Spahr

Now it is 16.7 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16.5 mag in good condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   4 21.21    8 47.7   0.909   1.774   139   16.5  21:22 (  0, 64)  
Jan. 12   4 20.70   11 47.2   0.946   1.772   133   16.6  20:55 (  0, 67)  

* C/2010 U3 ( Boattini )

Now it is 16.1 mag (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). It stays 16-17 mag for a long time until 2020. It is observable in good condition in the Northern Hemisphere. It is not observable at all in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 58.86   71 47.9   7.969   8.451   116   16.6   5:03 (180, 53)  
Jan. 12  11 59.06   72 18.1   7.948   8.450   117   16.6   4:35 (180, 53)  

* C/2016 A1 ( PanSTARRS )

It brightened up to 14.7 mag in early 2018 (Jan. 25, Catalina Sky Survey). Now it is fading slowly. Now it is 16.4 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in good condition for a long time until the comet fades out. It is never observable again in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   6 13.85   72 58.0   5.446   6.116   129   16.7  23:14 (180, 52)  
Jan. 12   5 50.47   73  6.2   5.501   6.141   126   16.7  22:24 (180, 52)  

* 59P/Kearns-Kwee

Now it is 17.0 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17 mag in good condition until February. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   8 25.93   23 48.7   1.556   2.504   160   16.7   1:31 (  0, 79)  
Jan. 12   8 20.39   23 37.9   1.551   2.522   168   16.8   0:58 (  0, 79)  

* 164P/Christensen

Now it is 17.3 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in winter. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 21.05   23 38.1   1.926   2.572   120   17.0   4:25 (  0, 79)  
Jan. 12  11 21.20   24 42.2   1.894   2.613   127   17.0   3:58 (  0, 80)  

* C/2018 W2 ( Africano )

It is expected to brighten up to 10 mag in autumn in 2019. Now it is 17.4 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable for a long time while the comet is brightening. In the Southern Hemisphere, it it not observable until mid September in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  13 44.87   55 45.0   3.073   3.427   102   17.3   5:38 (205, 66)  
Jan. 12  13 53.71   58 46.1   2.954   3.357   105   17.1   5:38 (196, 65)  

* 247P/LINEAR

Now it is 17.9 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in winter in the Northern Hemisphere. It locates very low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 10.98   35  6.8   0.745   1.536   124   17.2   4:15 (  0, 90)  
Jan. 12  11 19.08   35 57.3   0.737   1.556   128   17.2   3:55 (180, 89)  

* C/2014 B1 ( Schwartz )

Now it is 17.1 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. It stays observable at 17 mag in good condition until summer in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  11 43.49    6  5.4   9.540   9.923   110   17.2   4:47 (  0, 61)  
Jan. 12  11 43.73    6 16.7   9.443   9.933   117   17.2   4:20 (  0, 61)  

* P/2014 C1 ( TOTAS )

First return of a new periodic comet discovered in 2014. It has not been recovered yet. Now it is not detected, fainter than 20.0 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). The condition of this apparition is excelllent. It will brighten rapidly, and will be observable at 15.5 mag in excellent condition in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  10 24.37    7 15.2   1.224   1.994   128   17.4   3:28 (  0, 62)  
Jan. 12  10 27.59    6 58.9   1.141   1.964   135   17.2   3:04 (  0, 62)  

* 361P/2017 S4 ( Spacewatch )

Now it is 16.0 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It was observed at 18 mag in last winter. It will be observable in good condition at 16-17 mag also in this winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   7  8.85    2 10.3   2.108   3.048   159   17.3   0:14 (  0, 57)  
Jan. 12   7  4.16    2 19.2   2.127   3.067   159   17.4  23:37 (  0, 57)  

* C/2015 V2 ( Johnson )

It brightened up to 7 mag from May to June in 2017. Now it is fading. It has already faded down to 15.9 mag (Dec. 8, Thomas Lehmann). In the Southern Hemisphere, it stays observable for a long time after this. It will never be observable again in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   0 52.51  -45 27.2   6.573   6.349    72   17.3  18:32 (  7,  9)  
Jan. 12   0 54.45  -44 24.9   6.702   6.407    68   17.4  18:37 ( 12,  9)  

* 74P/Smirnova-Chernykh

Now it is 17.0 mag (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in 2019. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  15 12.28  -13 56.0   4.207   3.727    54   17.4   5:38 (315, 28)  
Jan. 12  15 19.28  -14 23.5   4.126   3.734    60   17.4   5:38 (321, 31)  

* 239P/LINEAR

Now it is 17.2 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17.5 mag in excellent condition in January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   8 14.55    3 24.2   0.710   1.650   153   17.4   1:19 (  0, 58)  
Jan. 12   8 12.93    1 36.0   0.698   1.650   157   17.4   0:50 (  0, 57)  

* C/2015 XY1 ( Lemmon )

Now it is 17.2 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). It was observed at 17 mag in last winter. It will be observable in good condition at 17.5 mag also in this winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   4 41.97    4 28.2   7.279   8.074   141   17.5  21:43 (  0, 59)  
Jan. 12   4 37.38    4 17.1   7.365   8.082   134   17.5  21:11 (  0, 59)  

* C/2018 F4 ( PanSTARRS )

It stays 16 mag for a long time from 2019 to 2020. It is observable in excellent condition in the Southern Hemisphere. It is hardly observable in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5  14 12.91  -36  0.1   4.933   4.569    62   17.6   5:38 (339, 15)  
Jan. 12  14 15.25  -37 30.8   4.794   4.529    68   17.5   5:38 (345, 15)  

* 369P/2018 P1 ( Hill )

First return of a new periodic comet which brightened up to 17.5 mag in 2010. Now it is 17.1 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and will be fainter than 18 mag in late January. It is observable in excellent condition in the Northern Hemisphere. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   5 47.40   37 32.1   1.147   2.093   158   17.5  22:48 (180, 87)  
Jan. 12   5 44.07   37 38.9   1.197   2.116   151   17.6  22:18 (180, 87)  

* 159P/LONEOS

Now it is 16.9 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17.5 mag until January, in good condition in the Northern Hemisphere. It locates very low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   6  2.39   43 43.0   2.918   3.835   155   17.6  23:03 (180, 81)  
Jan. 12   5 57.03   43 53.9   2.961   3.848   150   17.6  22:30 (180, 81)  

* 232P/Hill

It was expected to be observable at 17.5 mag in good condition in winter in the Northern Hemisphere. But actually, it is so faint as 21.0 mag (Oct. 5, K. Sarneczky, et. al). It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   5 19.18   34 41.1   2.112   3.030   154   17.7  22:20 (  0, 90)  
Jan. 12   5 14.66   34 50.3   2.149   3.024   147   17.7  21:48 (  0, 90)  

* 373P/2018 R2 ( Rinner )

Now it is 17.6 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). First return of a new periodic comet which brightened up to 16 mag in 2011. It is observable at 17.5 mag in good condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   2 39.49   11 54.0   1.794   2.406   117   17.7  19:41 (  0, 67)  
Jan. 12   2 43.30   11 40.3   1.861   2.393   110   17.7  19:18 (  0, 67)  

* 31P/Schwassmann-Wachmann 2

Now it is 17.9 mag (Dec. 31, Toshihiko Ikemura, Hirohisa Sato). It is observable at 18 mag in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   6 48.42   21 38.7   2.521   3.504   176   17.9  23:49 (  0, 77)  
Jan. 12   6 43.36   21 52.0   2.528   3.498   168   17.9  23:16 (  0, 77)  

* C/2018 X2 ( Fitzsimmons )

Now it is 18.0 mag (Dec. 13, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag from spring to summer. But it is hardly observable. In the Northern Hemisphere, it is observable only until May. In the Southern Hemisphere, it stays locating extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   3 40.79   51 49.7   2.231   2.980   131   18.0  20:42 (180, 73)  
Jan. 12   3 38.84   50 56.5   2.233   2.928   126   17.9  20:13 (180, 74)  

* C/2016 X1 ( Lemmon )

Now it is 18.1 mag (Dec. 14, Toshihiko Ikemura, Hirohisa Sato). It is observable at 18 mag in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan.  5   7 21.20    4 11.3   6.662   7.598   160   17.9   0:26 (  0, 59)  
Jan. 12   7 18.86    4  3.3   6.652   7.594   162   17.9  23:52 (  0, 59)  

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